US5089979A - Apparatus for digital calibration of detachable transducers - Google Patents

Apparatus for digital calibration of detachable transducers Download PDF

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US5089979A
US5089979A US07/308,092 US30809289A US5089979A US 5089979 A US5089979 A US 5089979A US 30809289 A US30809289 A US 30809289A US 5089979 A US5089979 A US 5089979A
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digital
probe
memory
signal
coupled
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Alexander McEachern
Frederic W. Nitz
Scott C. Terry
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Basic Measuring Instruments
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Basic Measuring Instruments
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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/10Calibration or testing
    • H03M1/1009Calibration
    • H03M1/1033Calibration over the full range of the converter, e.g. for correcting differential non-linearity
    • H03M1/1038Calibration over the full range of the converter, e.g. for correcting differential non-linearity by storing corrected or correction values in one or more digital look-up tables
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G01D18/008Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00 with calibration coefficients stored in memory
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/02Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
    • G01D3/022Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation having an ideal characteristic, map or correction data stored in a digital memory
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/005Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
    • GPHYSICS
    • G12INSTRUMENT DETAILS
    • G12BCONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B13/00Calibrating of instruments and apparatus
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12Analogue/digital converters

Definitions

  • This invention relates to the field of measuring instruments with detachable transducers, probes, sensors, and the like. More particularly, this invention relates to the individual digital calibration of such transducers.
  • Measuring apparatuses having means for digitally removing errors from a measurement system by converting one or more measurements to a digital value or values and then applying correction algorithms to the digital value or values. These algorithms make use of a table or tables of previously stored digital data which describe the corrections required to make the measurement system more accurate. These tables are stored in the measurement system, and effectively describe the errors of the complete measurement system including a transducer, amplifiers, filters, and analog to digital (A/D) converters.
  • A/D analog to digital
  • FIG. 1 shows a typical prior art circuit in which temperature measurements are converted to a voltage 17 by a transducer 16.
  • the voltage 17 is applied to calibrated measuring system 100.
  • the internal signal is converted to a digital value by an A/D converter 11. Errors may be introduced by the transducer characteristics, amplifier and filter offset and gain errors, and A/D converter linearity and gain errors.
  • a microprocessor 13 looks up this uncorrected digital value 12 in a table of uncorrected values vs. corrected digital value 14.
  • the corrected value can be provided to a user in the display 15.
  • the microprocessor may apply more complicated correction algorithms, such as interpolation and data transformations, to reduce the amount of data stored in the table or to increase the accuracy of the result.
  • this prior art digital calibration makes it easier to automate the manufacturing process for the measurement system.
  • Calibration can be performed by a completely automated system which applies a series of known values to the transducer, examines the uncorrected output of the measurement system under calibration, and builds a table of corrections which can then be stored in non-volatile digital memory in the measurement system.
  • FIG. 2 shows a graphical representation of the table of corrections 14 comparing the uncorrected amplitude 200 to corrected amplitude 201. If the system introduces no errors the uncorrected data 12 will fall on the dotted line 202. Offset errors are shown as the line 203, gain errors as the line 204 and non-linearity errors as the line 205. A more complete discussion of such systems may be found in the background section of our co-pending application entitled METHOD AND APPARATUS FOR CALIBRATING TRANSDUCER/AMPLIFIER SYSTEMS, Ser. No. 308,305 now U.S. Pat. No. 5,014,229.
  • the table of corrections 14 describes the complete system, replacing any element of the system including the transducer requires re-calibrating the measurement system.
  • Certain prior art systems include the transducer 16 in the calibration procedure while others calibrate the remainder of the system 100 ignoring errors introduced by the transducer 16. This may be impractical, especially if many plug-in transducers are desirable. Such a system may be desirable, for example, in a temperature sensing system having several probes, each of which is sensitive over different ranges of temperatures.
  • This invention is for an apparatus to calibrate detachable transducers.
  • the apparatus includes a control system having a processor and a processor memory.
  • the processor memory includes a first table of corrections for correcting errors introduced by the control system.
  • the apparatus also includes a detachable plug-in transducer module.
  • the module has a transducer and a module memory.
  • the module memory includes a second table of corrections for correcting errors introduced by the transducer.
  • the module memory is preferably non-volatile memory.
  • FIG. 1 shows a block diagram of a typical prior art digital calibration system.
  • FIG. 2 shows a graphical representation of a typical prior art digital calibration table.
  • FIG. 3 shows the preferred embodiment of the present invention where digital calibration data is stored both in the transducer and in the measurement system.
  • FIG. 4 shows an alternate embodiment of the present invention. Like numerals will be used for the same elements found in FIG. 3.
  • the invention includes a plug-in transducer module 40 which includes means for storing transducer correction tables in a non-volatile digital memory 39 which is physically associated with a transducer 36.
  • the transducer module 40 is plugged into a correction system 300.
  • the transducer 36 may be a temperature transducer, a humidity transducer, a current transducer, a strain transducer, microphone, or any other type of transducer for which the first-order errors are either repeatable or predictable over time.
  • the non-volatile digital memory 39 may be EAROM, EPROM, or any other means which is well known in the art.
  • the analog output 37 of the transducer is electrically connected to the measurement system with a detachable connection 38.
  • the transducer correction tables 39 are accessible to the microprocessor through a similar detachable connection 41, which may consist of additional pins on the same connector.
  • the analog output 37 of the transducer is applied to the amplifier/filter 30. Its output is applied to the input of an analog to digital converter 31, which in turn provides uncorrected digital data 32 to a microprocessor 33.
  • the microprocessor may be replaced by appropriate random logic such as an ASIC, PLA or PAL.
  • the microprocessor 33 first applies the internally stored correction table for the amplifier, filter, and A/D errors 34.
  • the digital result is an accurate measurement of the analog input at the connector 38.
  • the digital result can be shown to the user in a display 35.
  • the microprocessor then applies the transducer correction table stored with the transducer 39 to this digital result, yielding the final correct digital measurement.
  • the microprocessor can then display or otherwise make use of this measurement.
  • Each transducer 36 can be individually calibrated by an automated system which applies a set of known signals to the transducer 36, measures the transducer's analog output 37, builds a correction table for this transducer, and stores the correction table in the digital non-volatile memory 39 associated with that transducer.
  • the accuracy of certain types of transducers may vary as a function of external physical parameters. For example, errors may be introduced, in part, to a current sensing transducer by the temperature at which the transducer operates or errors may be introduced, in part, to a microphone transducer by the ambient humidity. Utilizing the preferred embodiment of the present invention to calibrate transducers which are sensitive to such physical parameters will produce accurate results only when operating under conditions similar to those at which the calibration took place.
  • FIG. 4 shows a block diagram of an alternate embodiment of the present invention.
  • a correction transducer 600 is included in the transducer module 40.
  • the correction transducer 600 is chosen to sense that parameter to which the primary transducer 36 is most sensitive, e.g. humidity for a microphone transducer.
  • the transducer correction tables 39 are expanded to include information related to the correction transducer 600. For example, if the humidity were expected to vary over the range 30% to 95% relative humidity for a given microphone, the transducer correction tables 39 may include a complete set of correction tables to correct known errors for the transducer 36 for every change of 5% humidity in that range of humidity.
  • the value measured by the correction transducer 600 is applied to the A/D converter 31 through connector 601
  • the microprocessor 33 controls the A/D converter 31 through control line 602 to read the signal from the transducer 36 or from the correction transducer 600 as appropriate. In this manner, the microprocessor 33 reads the value of the physical parameter measured by the correction transducer 600 to determine which of the sets of transducer correction tables 39 to apply. The microprocessor then reads the value measured by the transducer 36 and corrects any errors introduced by that device.
  • the microprocessor 33 controls the amplifier/filter 30 through control line 604 to read the signal from the transducer 36 or the correction transducer 600.

Abstract

The present invention is for digital calibration of plug-in transducers and the like. The invention comprises means for digitally storing error-correcting tables in a physical location which is associated with the transducer, and a means for interpreting those tables.

Description

FIELD OF THE INVENTION
This invention relates to the field of measuring instruments with detachable transducers, probes, sensors, and the like. More particularly, this invention relates to the individual digital calibration of such transducers.
BACKGROUND OF THE INVENTION
Measuring apparatuses are known having means for digitally removing errors from a measurement system by converting one or more measurements to a digital value or values and then applying correction algorithms to the digital value or values. These algorithms make use of a table or tables of previously stored digital data which describe the corrections required to make the measurement system more accurate. These tables are stored in the measurement system, and effectively describe the errors of the complete measurement system including a transducer, amplifiers, filters, and analog to digital (A/D) converters.
FIG. 1 shows a typical prior art circuit in which temperature measurements are converted to a voltage 17 by a transducer 16. The voltage 17 is applied to calibrated measuring system 100. After amplification and filtering 10, the internal signal is converted to a digital value by an A/D converter 11. Errors may be introduced by the transducer characteristics, amplifier and filter offset and gain errors, and A/D converter linearity and gain errors.
A microprocessor 13 then looks up this uncorrected digital value 12 in a table of uncorrected values vs. corrected digital value 14. The corrected value can be provided to a user in the display 15. The microprocessor may apply more complicated correction algorithms, such as interpolation and data transformations, to reduce the amount of data stored in the table or to increase the accuracy of the result.
In addition to increasing the accuracy of the measurement system, this prior art digital calibration makes it easier to automate the manufacturing process for the measurement system. Calibration can be performed by a completely automated system which applies a series of known values to the transducer, examines the uncorrected output of the measurement system under calibration, and builds a table of corrections which can then be stored in non-volatile digital memory in the measurement system.
FIG. 2 shows a graphical representation of the table of corrections 14 comparing the uncorrected amplitude 200 to corrected amplitude 201. If the system introduces no errors the uncorrected data 12 will fall on the dotted line 202. Offset errors are shown as the line 203, gain errors as the line 204 and non-linearity errors as the line 205. A more complete discussion of such systems may be found in the background section of our co-pending application entitled METHOD AND APPARATUS FOR CALIBRATING TRANSDUCER/AMPLIFIER SYSTEMS, Ser. No. 308,305 now U.S. Pat. No. 5,014,229.
Because the table of corrections 14 describes the complete system, replacing any element of the system including the transducer requires re-calibrating the measurement system. Certain prior art systems include the transducer 16 in the calibration procedure while others calibrate the remainder of the system 100 ignoring errors introduced by the transducer 16. This may be impractical, especially if many plug-in transducers are desirable. Such a system may be desirable, for example, in a temperature sensing system having several probes, each of which is sensitive over different ranges of temperatures.
Some prior art systems ignore the errors of plug-in transducers and only calibrate the remaining parts of the measurement system; this approach can leave in place substantial transducer errors. Other prior art systems use analog calibration of plug-in transducers; this approach makes it more difficult to automate the production of the entire measurement system.
SUMMARY OF THE INVENTION
This invention is for an apparatus to calibrate detachable transducers. The apparatus includes a control system having a processor and a processor memory. The processor memory includes a first table of corrections for correcting errors introduced by the control system. The apparatus also includes a detachable plug-in transducer module. The module has a transducer and a module memory. The module memory includes a second table of corrections for correcting errors introduced by the transducer. The module memory is preferably non-volatile memory.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a block diagram of a typical prior art digital calibration system.
FIG. 2 shows a graphical representation of a typical prior art digital calibration table.
FIG. 3 shows the preferred embodiment of the present invention where digital calibration data is stored both in the transducer and in the measurement system.
FIG. 4 shows an alternate embodiment of the present invention. Like numerals will be used for the same elements found in FIG. 3.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The invention includes a plug-in transducer module 40 which includes means for storing transducer correction tables in a non-volatile digital memory 39 which is physically associated with a transducer 36. The transducer module 40 is plugged into a correction system 300. The transducer 36 may be a temperature transducer, a humidity transducer, a current transducer, a strain transducer, microphone, or any other type of transducer for which the first-order errors are either repeatable or predictable over time. The non-volatile digital memory 39 may be EAROM, EPROM, or any other means which is well known in the art. The analog output 37 of the transducer is electrically connected to the measurement system with a detachable connection 38. The transducer correction tables 39 are accessible to the microprocessor through a similar detachable connection 41, which may consist of additional pins on the same connector. The analog output 37 of the transducer is applied to the amplifier/filter 30. Its output is applied to the input of an analog to digital converter 31, which in turn provides uncorrected digital data 32 to a microprocessor 33. The microprocessor may be replaced by appropriate random logic such as an ASIC, PLA or PAL. The microprocessor 33 first applies the internally stored correction table for the amplifier, filter, and A/D errors 34. The digital result is an accurate measurement of the analog input at the connector 38. The digital result can be shown to the user in a display 35. The microprocessor then applies the transducer correction table stored with the transducer 39 to this digital result, yielding the final correct digital measurement. The microprocessor can then display or otherwise make use of this measurement.
Each transducer 36 can be individually calibrated by an automated system which applies a set of known signals to the transducer 36, measures the transducer's analog output 37, builds a correction table for this transducer, and stores the correction table in the digital non-volatile memory 39 associated with that transducer.
The accuracy of certain types of transducers may vary as a function of external physical parameters. For example, errors may be introduced, in part, to a current sensing transducer by the temperature at which the transducer operates or errors may be introduced, in part, to a microphone transducer by the ambient humidity. Utilizing the preferred embodiment of the present invention to calibrate transducers which are sensitive to such physical parameters will produce accurate results only when operating under conditions similar to those at which the calibration took place.
FIG. 4 shows a block diagram of an alternate embodiment of the present invention. A correction transducer 600 is included in the transducer module 40. The correction transducer 600 is chosen to sense that parameter to which the primary transducer 36 is most sensitive, e.g. humidity for a microphone transducer.
The transducer correction tables 39 are expanded to include information related to the correction transducer 600. For example, if the humidity were expected to vary over the range 30% to 95% relative humidity for a given microphone, the transducer correction tables 39 may include a complete set of correction tables to correct known errors for the transducer 36 for every change of 5% humidity in that range of humidity.
The value measured by the correction transducer 600 is applied to the A/D converter 31 through connector 601 The microprocessor 33 controls the A/D converter 31 through control line 602 to read the signal from the transducer 36 or from the correction transducer 600 as appropriate. In this manner, the microprocessor 33 reads the value of the physical parameter measured by the correction transducer 600 to determine which of the sets of transducer correction tables 39 to apply. The microprocessor then reads the value measured by the transducer 36 and corrects any errors introduced by that device.
If the signal produced by the correction transducer 600 is too small to be accurately read by the A/D converter 31 alone that signal is applied to the amplifier/filter 30 through connector 603. In this case, the microprocessor 33 controls the amplifier/filter 30 through control line 604 to read the signal from the transducer 36 or the correction transducer 600.

Claims (10)

What is claimed is:
1. A measuring system for measuring a parameter comprising:
a) a plurality of interchangeable probes for measuring a parameter wherein each probe includes:
1) a transducer integral to the probe for measuring the parameter and providing a signal representative of the parameter; and
2) a first digital memory integral to the probe for storing a table of probe correction data; and
b) a plurality of base units wherein any one of the interchangeable probes can be coupled to any one of the base units for providing the signal and the data to that base unit, wherein each base unit includes analog electronic circuits coupled to receive the signal from the probe and which includes:
1) an analog to digital converter;
2) a second digital memory integral to the base unit for storing a table of base unit correction data; and
3) digital electronic circuits coupled to the first digital memory and second digital memory for accessing the data stored in the first memory and the second memory and for making a correction for any errors introduced by the probe and the base unit, respectively.
2. The system according to claim 1 wherein the first digital memory and the second digital memory are non-volatile memory circuits.
3. The system according to claim 1 wherein the parameter is electric current.
4. The system according to claim 1 wherein the analog electronic circuits includes an amplifier coupled to receive the signal for forming an amplified signal, a filter coupled to receive the amplified signal for forming a filtered signal and coupled to provide the filtered signal to the analog to digital converter.
5. The system according to claim 1 wherein the digital electronic circuits include a microprocessor.
6. The system according to claim 1 wherein the digital electronic circuits include a PLA.
7. The system according to claim 1 wherein the digital electronic circuits include a PAL.
8. A measuring system for measuring a parameter comprising:
a) a plurality of base unit instrument wherein each base unit comprises:
i) an amplifier for forming an amplified analog signal;
ii) a filter coupled to the amplifier to receive the amplified analog signal for forming a filtered signal;
iii) an analog to digital converter coupled to the filter to receive the filtered signal for forming a digital signal;
iv) a digital circuit coupled to the converter to receive the digital signal; and
v) a first digital memory coupled to the digital circuit for storing base unit correction tables for correcting repeatable errors introduced by the base unit; and
b) a plurality of interchangeable probes for sensing the parameter wherein each one of the probes comprises:
i) a connector for coupling that probe to any one of the base units;
ii) a transducer mounted in the probe and electrically coupled to the amplifier through the connector for sensing the parameter and for providing an analog signal to the amplifier which is representative of the parameter; and
ii) a second digital memory of probe correction tables mounted in the probe and electrically coupled to the digital circuit for correcting repeatable errors introduced by the probe,
wherein any probe may be coupled to any base unit so that errors introduced by the base unit and the probe are corrected by the digital circuit using the base unit correction tables stored in the first memory and the probe correction tables stored in the second memory.
9. The system according to claim 8 wherein the first digital memory and the second digital memory are non-volatile memory circuits.
10. The system according to claim 8 wherein the parameter is electric current.
US07/308,092 1989-02-08 1989-02-08 Apparatus for digital calibration of detachable transducers Expired - Lifetime US5089979A (en)

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Cited By (122)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5243545A (en) * 1991-05-06 1993-09-07 Ormond A Newman Data linearization system
US5249143A (en) * 1991-05-20 1993-09-28 Newport Corporation Coupling radiant energy/electric current transducers to processors
US5261266A (en) * 1990-01-24 1993-11-16 Wisconsin Alumni Research Foundation Sensor tip for a robotic gripper and method of manufacture
US5313848A (en) * 1991-10-18 1994-05-24 Sensitech, Inc. Disposable electronic monitor device
WO1994012940A1 (en) * 1992-11-25 1994-06-09 Mcbean Ronald V Instrumentation system with multiple sensor modules
US5321638A (en) * 1990-04-30 1994-06-14 Witney Keith C Calibrated sensor systems and methods of manufacturing same
US5325315A (en) * 1990-12-28 1994-06-28 Westinghouse Electric Corp. Process for auto calibration of a microprocessor based overcurrent protective device and apparatus
US5343144A (en) * 1991-02-28 1994-08-30 Sony Corporation Electronic device
US5381074A (en) * 1993-06-01 1995-01-10 Chrysler Corporation Self calibrating lighting control system
EP0677721A1 (en) * 1994-04-16 1995-10-18 ABB Management AG Measuring device, in particular for a data acquisition station
US5502999A (en) * 1992-10-05 1996-04-02 Fisher Controls International, Inc. Electro-pneumatic converter calibration
US5528519A (en) * 1993-05-20 1996-06-18 Otax Co., Ltd. Connector for measuring apparatus
US5706215A (en) * 1995-06-30 1998-01-06 Harris Corporation Method and system for adjusting replacement component characteristics
US5734596A (en) * 1994-04-26 1998-03-31 The United States Of America As Represented By Administrator National Aeronautics And Space Administration Self-calibrating and remote programmable signal conditioning amplifier system and method
US5760310A (en) * 1994-11-30 1998-06-02 Rosemount Inc. Transmitter with fill fluid loss detection
US5790432A (en) * 1995-08-21 1998-08-04 Solar Light Company, Inc. Universal measuring instrument with signal processing algorithm encapsulated into interchangeable intelligent detectors
US5808902A (en) * 1996-05-23 1998-09-15 Basic Measuring Instruments Power quality transducer for use with supervisory control systems
US5839094A (en) * 1995-06-30 1998-11-17 Ada Technologies, Inc. Portable data collection device with self identifying probe
US5875413A (en) * 1996-05-17 1999-02-23 Waekon Corporation Digital remote gauge assembly
US5896166A (en) * 1993-06-02 1999-04-20 Envision Medical Corporation Remote CCD video camera with non-volatile digital memory
DE19805606A1 (en) * 1998-02-12 1999-09-02 Schmersal Eot Gmbh & Co Kg Procedure for configuring sensors
US5963726A (en) * 1998-03-20 1999-10-05 National Instruments Corporation Instrumentation system and method including an improved driver software architecture
US6032109A (en) * 1996-10-21 2000-02-29 Telemonitor, Inc. Smart sensor module
EP0949592A3 (en) * 1997-11-21 2000-04-12 Prüftechnik Dieter Busch Ag System for measuring or to identify oscillation or noise
US6085156A (en) * 1998-03-20 2000-07-04 National Instruments Corporation Instrumentation system and method having instrument interchangeability
US6092410A (en) * 1998-02-20 2000-07-25 Marconi Commerce Systems Inc. Meter calibration and drift compensation device
WO2000065311A1 (en) * 1999-04-27 2000-11-02 D2T Electronique Device for automatic identification for a sensor for test stands
WO2000079233A1 (en) * 1999-06-18 2000-12-28 Samba Sensors Ab A method and a device for bending compensation in intensity-based fibre-optical measuring systems
WO2001016571A1 (en) * 1999-08-27 2001-03-08 Rosemount Inc. Prediction of error magnitude in a pressure transmitter
US6232764B1 (en) 1998-06-12 2001-05-15 Tektronix, Inc. Accessory with internal adjustments controlled by host
US6243654B1 (en) 1997-10-07 2001-06-05 Telemonitor, Inc. Transducer assembly with smart connector
US6295082B1 (en) * 1994-02-23 2001-09-25 Smith & Nephew, Inc. Camera head with digital memory for storing information about the image sensor
FR2807514A1 (en) * 2000-04-05 2001-10-12 Vergne Innovation Pressure sensor, has Hall sensor with two point calibration avoids adjustment is simple and cheap
US6321171B1 (en) 1998-04-03 2001-11-20 Tektronix, Inc. Electronic measurement instrument probe accessory offset, gain, and linearity correction method
US6427129B1 (en) * 1997-07-14 2002-07-30 Endress + Hauser Gmbh + Co. Measuring assembly
US6505517B1 (en) 1999-07-23 2003-01-14 Rosemount Inc. High accuracy signal processing for magnetic flowmeter
US6519546B1 (en) 1996-11-07 2003-02-11 Rosemount Inc. Auto correcting temperature transmitter with resistance based sensor
US6532392B1 (en) 1996-03-28 2003-03-11 Rosemount Inc. Transmitter with software for determining when to initiate diagnostics
US6539267B1 (en) 1996-03-28 2003-03-25 Rosemount Inc. Device in a process system for determining statistical parameter
US20030088374A1 (en) * 2001-09-25 2003-05-08 Slater Byron J. Arrangement for providing sensor calibration information in a modular utility meter
US6601005B1 (en) 1996-11-07 2003-07-29 Rosemount Inc. Process device diagnostics using process variable sensor signal
US6611775B1 (en) 1998-12-10 2003-08-26 Rosemount Inc. Electrode leakage diagnostics in a magnetic flow meter
US6615149B1 (en) 1998-12-10 2003-09-02 Rosemount Inc. Spectral diagnostics in a magnetic flow meter
US6629059B2 (en) 2001-05-14 2003-09-30 Fisher-Rosemount Systems, Inc. Hand held diagnostic and communication device with automatic bus detection
US20040024568A1 (en) * 1999-06-25 2004-02-05 Evren Eryurek Process device diagnostics using process variable sensor signal
US6691068B1 (en) * 2000-08-22 2004-02-10 Onwafer Technologies, Inc. Methods and apparatus for obtaining data for process operation, optimization, monitoring, and control
US20040070495A1 (en) * 2002-10-15 2004-04-15 Advanced Custom Sensors, Inc. Sensor signal conditioner
US6754601B1 (en) 1996-11-07 2004-06-22 Rosemount Inc. Diagnostics for resistive elements of process devices
US6772036B2 (en) 2001-08-30 2004-08-03 Fisher-Rosemount Systems, Inc. Control system using process model
US6801868B1 (en) 2002-10-15 2004-10-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Real time calibration method for signal conditioning amplifiers
US20050011278A1 (en) * 2003-07-18 2005-01-20 Brown Gregory C. Process diagnostics
US20050030185A1 (en) * 2003-08-07 2005-02-10 Huisenga Garrie D. Process device with quiescent current diagnostics
US6859755B2 (en) 2001-05-14 2005-02-22 Rosemount Inc. Diagnostics for industrial process control and measurement systems
US20050072239A1 (en) * 2003-09-30 2005-04-07 Longsdorf Randy J. Process device with vibration based diagnostics
US6907383B2 (en) 1996-03-28 2005-06-14 Rosemount Inc. Flow diagnostic system
US20050132808A1 (en) * 2003-12-23 2005-06-23 Brown Gregory C. Diagnostics of impulse piping in an industrial process
US20050159802A1 (en) * 2004-01-15 2005-07-21 Icon Interventional Systems, Inc., An Ohio Corporation Method for verifying position on an angioplasty balloon
US6920799B1 (en) 2004-04-15 2005-07-26 Rosemount Inc. Magnetic flow meter with reference electrode
US6970003B2 (en) 2001-03-05 2005-11-29 Rosemount Inc. Electronics board life prediction of microprocessor-based transmitters
US20060036404A1 (en) * 1996-03-28 2006-02-16 Wiklund David E Process variable transmitter with diagnostics
US7046180B2 (en) 2004-04-21 2006-05-16 Rosemount Inc. Analog-to-digital converter with range error detection
US7085610B2 (en) 1996-03-28 2006-08-01 Fisher-Rosemount Systems, Inc. Root cause diagnostics
US7114388B1 (en) 2003-04-21 2006-10-03 Ada Technologies, Inc. Geographically distributed environmental sensor system
US20060277000A1 (en) * 1996-03-28 2006-12-07 Wehrs David L Flow measurement diagnostics
US20060282580A1 (en) * 2005-06-08 2006-12-14 Russell Alden C Iii Multi-protocol field device interface with automatic bus detection
US20060290488A1 (en) * 2005-05-27 2006-12-28 Bionime Corporation Coding module and sensing meter and system therefor
US20070010968A1 (en) * 1996-03-28 2007-01-11 Longsdorf Randy J Dedicated process diagnostic device
US20070068225A1 (en) * 2005-09-29 2007-03-29 Brown Gregory C Leak detector for process valve
US7254518B2 (en) 1996-03-28 2007-08-07 Rosemount Inc. Pressure transmitter with diagnostics
US20070265715A1 (en) * 2004-04-26 2007-11-15 Benoit Chouinard Method for Permanent Calibration Based on Actual Measurement
US20070271069A1 (en) * 2006-05-17 2007-11-22 Honeywell International Inc. Signal conditioning ic with conditioning-coefficient memory
US7321846B1 (en) 2006-10-05 2008-01-22 Rosemount Inc. Two-wire process control loop diagnostics
US20080125884A1 (en) * 2006-09-26 2008-05-29 Schumacher Mark S Automatic field device service adviser
US20090027659A1 (en) * 1999-06-18 2009-01-29 Sambra Sensors Ab Measuring system for measuring a physical parameter influencing a sensor element
US20090043530A1 (en) * 2007-08-06 2009-02-12 Sittler Fred C Process variable transmitter with acceleration sensor
US20090083001A1 (en) * 2007-09-25 2009-03-26 Huisenga Garrie D Field device for digital process control loop diagnostics
US20090217755A1 (en) * 2008-02-29 2009-09-03 Omega Engineering, Inc. Smart sensor
US7623932B2 (en) 1996-03-28 2009-11-24 Fisher-Rosemount Systems, Inc. Rule set for root cause diagnostics
US7658196B2 (en) 2005-02-24 2010-02-09 Ethicon Endo-Surgery, Inc. System and method for determining implanted device orientation
US7750642B2 (en) 2006-09-29 2010-07-06 Rosemount Inc. Magnetic flowmeter with verification
US7775966B2 (en) 2005-02-24 2010-08-17 Ethicon Endo-Surgery, Inc. Non-invasive pressure measurement in a fluid adjustable restrictive device
US7775215B2 (en) 2005-02-24 2010-08-17 Ethicon Endo-Surgery, Inc. System and method for determining implanted device positioning and obtaining pressure data
US20100288054A1 (en) * 2009-05-12 2010-11-18 Foss Scot R System to detect poor process ground connections
US7844342B2 (en) 2008-02-07 2010-11-30 Ethicon Endo-Surgery, Inc. Powering implantable restriction systems using light
US20100305465A1 (en) * 2009-05-27 2010-12-02 Honyewell International Inc. Multi-dynamic-range sensor
US7927270B2 (en) 2005-02-24 2011-04-19 Ethicon Endo-Surgery, Inc. External mechanical pressure sensor for gastric band pressure measurements
US7953501B2 (en) 2006-09-25 2011-05-31 Fisher-Rosemount Systems, Inc. Industrial process control loop monitor
US20110179879A1 (en) * 2008-12-19 2011-07-28 Honeywell International Inc. Multi range pressure sensor apparatus and method utilizing a single sense die and multiple signal paths
US8016745B2 (en) 2005-02-24 2011-09-13 Ethicon Endo-Surgery, Inc. Monitoring of a food intake restriction device
US8016744B2 (en) 2005-02-24 2011-09-13 Ethicon Endo-Surgery, Inc. External pressure-based gastric band adjustment system and method
US8034065B2 (en) 2008-02-26 2011-10-11 Ethicon Endo-Surgery, Inc. Controlling pressure in adjustable restriction devices
US8057492B2 (en) 2008-02-12 2011-11-15 Ethicon Endo-Surgery, Inc. Automatically adjusting band system with MEMS pump
US8066629B2 (en) 2005-02-24 2011-11-29 Ethicon Endo-Surgery, Inc. Apparatus for adjustment and sensing of gastric band pressure
US8100870B2 (en) 2007-12-14 2012-01-24 Ethicon Endo-Surgery, Inc. Adjustable height gastric restriction devices and methods
US8114345B2 (en) 2008-02-08 2012-02-14 Ethicon Endo-Surgery, Inc. System and method of sterilizing an implantable medical device
US8142452B2 (en) 2007-12-27 2012-03-27 Ethicon Endo-Surgery, Inc. Controlling pressure in adjustable restriction devices
US8152710B2 (en) 2006-04-06 2012-04-10 Ethicon Endo-Surgery, Inc. Physiological parameter analysis for an implantable restriction device and a data logger
WO2012056296A1 (en) * 2010-10-26 2012-05-03 Eaton Corporation Method of enabling calibration of a current transformer, and associated apparatus
US8175835B2 (en) 2006-05-17 2012-05-08 Honeywell International Inc. Flow sensor with conditioning-coefficient memory
US8187163B2 (en) 2007-12-10 2012-05-29 Ethicon Endo-Surgery, Inc. Methods for implanting a gastric restriction device
US8187162B2 (en) 2008-03-06 2012-05-29 Ethicon Endo-Surgery, Inc. Reorientation port
US8192350B2 (en) 2008-01-28 2012-06-05 Ethicon Endo-Surgery, Inc. Methods and devices for measuring impedance in a gastric restriction system
US8221439B2 (en) 2008-02-07 2012-07-17 Ethicon Endo-Surgery, Inc. Powering implantable restriction systems using kinetic motion
US8233995B2 (en) 2008-03-06 2012-07-31 Ethicon Endo-Surgery, Inc. System and method of aligning an implantable antenna
US8275313B1 (en) 2007-01-15 2012-09-25 Advanced Distributed Sensor Systems Long range, low power, mesh networking without concurrent timing
US8337389B2 (en) 2008-01-28 2012-12-25 Ethicon Endo-Surgery, Inc. Methods and devices for diagnosing performance of a gastric restriction system
US8377079B2 (en) 2007-12-27 2013-02-19 Ethicon Endo-Surgery, Inc. Constant force mechanisms for regulating restriction devices
US8591395B2 (en) 2008-01-28 2013-11-26 Ethicon Endo-Surgery, Inc. Gastric restriction device data handling devices and methods
US8591532B2 (en) 2008-02-12 2013-11-26 Ethicon Endo-Sugery, Inc. Automatically adjusting band system
US8656772B2 (en) 2010-03-22 2014-02-25 Honeywell International Inc. Flow sensor with pressure output signal
US8695417B2 (en) 2011-01-31 2014-04-15 Honeywell International Inc. Flow sensor with enhanced flow range capability
US8718981B2 (en) 2011-05-09 2014-05-06 Honeywell International Inc. Modular sensor assembly including removable sensing module
US8770034B2 (en) 2011-09-06 2014-07-08 Honeywell International Inc. Packaged sensor with multiple sensors elements
US8870742B2 (en) 2006-04-06 2014-10-28 Ethicon Endo-Surgery, Inc. GUI for an implantable restriction device and a data logger
US9052240B2 (en) 2012-06-29 2015-06-09 Rosemount Inc. Industrial process temperature transmitter with sensor stress diagnostics
US9052217B2 (en) 2012-11-09 2015-06-09 Honeywell International Inc. Variable scale sensor
US9207670B2 (en) 2011-03-21 2015-12-08 Rosemount Inc. Degrading sensor detection implemented within a transmitter
EP2284559A3 (en) * 2009-08-14 2016-03-23 General Electric Company Electrical equipment assembly and method of calibrating an electrical equipment assembly
US9602122B2 (en) 2012-09-28 2017-03-21 Rosemount Inc. Process variable measurement noise diagnostic
US10502760B2 (en) 2017-04-11 2019-12-10 General Electric Company Pitot-static air data test system with pilot and co-pilot verification
GB2602533A (en) * 2020-08-06 2022-07-06 Cirrus Logic Int Semiconductor Ltd Resistive sensor based data acquisition using low distortion analog front-end and digital gain error correction
US11782101B2 (en) 2020-08-06 2023-10-10 Cirrus Logic, Inc. Hall sensor-based data acquisition system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4303984A (en) * 1979-12-14 1981-12-01 Honeywell Inc. Sensor output correction circuit
US4313509A (en) * 1979-02-05 1982-02-02 Maatschappij Van Berkel's Patent N.V. Weighing apparatus
US4418392A (en) * 1980-06-26 1983-11-29 Tokyo Shibaura Denki Kabushiki Kaisha Measuring device
US4423408A (en) * 1981-02-09 1983-12-27 Honeywell Inc. Remote data gathering panel
US4592002A (en) * 1983-12-13 1986-05-27 Honeywell Inc. Method of digital temperature compensation and a digital data handling system utilizing the same
US4611304A (en) * 1983-07-27 1986-09-09 Sundstrand Data Control, Inc. Transducer memory circuit
US4845649A (en) * 1984-12-19 1989-07-04 Robert Bosch Gmbh Sensor for measuring physical dimensions and process for balancing the sensor
US4858615A (en) * 1981-11-10 1989-08-22 Sentron V.O.F. Catheter sensor and memory unit
US4868476A (en) * 1987-10-30 1989-09-19 Hewlett-Packard Company Transducer with integral memory
US4873655A (en) * 1987-08-21 1989-10-10 Board Of Regents, The University Of Texas System Sensor conditioning method and apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4313509A (en) * 1979-02-05 1982-02-02 Maatschappij Van Berkel's Patent N.V. Weighing apparatus
US4303984A (en) * 1979-12-14 1981-12-01 Honeywell Inc. Sensor output correction circuit
US4418392A (en) * 1980-06-26 1983-11-29 Tokyo Shibaura Denki Kabushiki Kaisha Measuring device
US4423408A (en) * 1981-02-09 1983-12-27 Honeywell Inc. Remote data gathering panel
US4858615A (en) * 1981-11-10 1989-08-22 Sentron V.O.F. Catheter sensor and memory unit
US4611304A (en) * 1983-07-27 1986-09-09 Sundstrand Data Control, Inc. Transducer memory circuit
US4592002A (en) * 1983-12-13 1986-05-27 Honeywell Inc. Method of digital temperature compensation and a digital data handling system utilizing the same
US4845649A (en) * 1984-12-19 1989-07-04 Robert Bosch Gmbh Sensor for measuring physical dimensions and process for balancing the sensor
US4873655A (en) * 1987-08-21 1989-10-10 Board Of Regents, The University Of Texas System Sensor conditioning method and apparatus
US4868476A (en) * 1987-10-30 1989-09-19 Hewlett-Packard Company Transducer with integral memory

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Nitz; "Self-Calibration Technique Improves Power Monitor"; Design News, pp. 141-146, May 20, 1989.
Nitz; Self Calibration Technique Improves Power Monitor ; Design News, pp. 141 146, May 20, 1989. *

Cited By (161)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261266A (en) * 1990-01-24 1993-11-16 Wisconsin Alumni Research Foundation Sensor tip for a robotic gripper and method of manufacture
US5321638A (en) * 1990-04-30 1994-06-14 Witney Keith C Calibrated sensor systems and methods of manufacturing same
US5325315A (en) * 1990-12-28 1994-06-28 Westinghouse Electric Corp. Process for auto calibration of a microprocessor based overcurrent protective device and apparatus
US5343144A (en) * 1991-02-28 1994-08-30 Sony Corporation Electronic device
US5243545A (en) * 1991-05-06 1993-09-07 Ormond A Newman Data linearization system
US5249143A (en) * 1991-05-20 1993-09-28 Newport Corporation Coupling radiant energy/electric current transducers to processors
US5313848A (en) * 1991-10-18 1994-05-24 Sensitech, Inc. Disposable electronic monitor device
USRE36200E (en) * 1991-10-18 1999-04-27 Sensitech Inc. Disposable electronic monitor device
US5502999A (en) * 1992-10-05 1996-04-02 Fisher Controls International, Inc. Electro-pneumatic converter calibration
WO1994012940A1 (en) * 1992-11-25 1994-06-09 Mcbean Ronald V Instrumentation system with multiple sensor modules
US5347476A (en) * 1992-11-25 1994-09-13 Mcbean Sr Ronald V Instrumentation system with multiple sensor modules
US5365462A (en) * 1992-11-25 1994-11-15 Mcbean Sr Ronald V Instrumentation system with multiple sensor modules providing calibration date information
US5375073A (en) * 1992-11-25 1994-12-20 Mcbean; Ronald V. Instrumentation system with multiple sensor modules providing accuracy code information
US5377128A (en) * 1992-11-25 1994-12-27 Mcbean; Ronald V. Self-calibrating instrumentation system with multiple sensor modules
US5528519A (en) * 1993-05-20 1996-06-18 Otax Co., Ltd. Connector for measuring apparatus
US5381074A (en) * 1993-06-01 1995-01-10 Chrysler Corporation Self calibrating lighting control system
US6313868B1 (en) 1993-06-02 2001-11-06 Linvatec Corporation Remote CCD video camera with non-volatile digital memory
US5896166A (en) * 1993-06-02 1999-04-20 Envision Medical Corporation Remote CCD video camera with non-volatile digital memory
US6295082B1 (en) * 1994-02-23 2001-09-25 Smith & Nephew, Inc. Camera head with digital memory for storing information about the image sensor
EP0677721A1 (en) * 1994-04-16 1995-10-18 ABB Management AG Measuring device, in particular for a data acquisition station
US5734596A (en) * 1994-04-26 1998-03-31 The United States Of America As Represented By Administrator National Aeronautics And Space Administration Self-calibrating and remote programmable signal conditioning amplifier system and method
US5760310A (en) * 1994-11-30 1998-06-02 Rosemount Inc. Transmitter with fill fluid loss detection
US5706215A (en) * 1995-06-30 1998-01-06 Harris Corporation Method and system for adjusting replacement component characteristics
US5839094A (en) * 1995-06-30 1998-11-17 Ada Technologies, Inc. Portable data collection device with self identifying probe
US5790432A (en) * 1995-08-21 1998-08-04 Solar Light Company, Inc. Universal measuring instrument with signal processing algorithm encapsulated into interchangeable intelligent detectors
US5946641A (en) * 1995-08-21 1999-08-31 Solar Light Company Universal measuring instrument with signal processing algorithm encapsulated into interchangeable intelligent detectors
US6907383B2 (en) 1996-03-28 2005-06-14 Rosemount Inc. Flow diagnostic system
US7949495B2 (en) 1996-03-28 2011-05-24 Rosemount, Inc. Process variable transmitter with diagnostics
US6532392B1 (en) 1996-03-28 2003-03-11 Rosemount Inc. Transmitter with software for determining when to initiate diagnostics
US20070010968A1 (en) * 1996-03-28 2007-01-11 Longsdorf Randy J Dedicated process diagnostic device
US20060036404A1 (en) * 1996-03-28 2006-02-16 Wiklund David E Process variable transmitter with diagnostics
US7254518B2 (en) 1996-03-28 2007-08-07 Rosemount Inc. Pressure transmitter with diagnostics
US7623932B2 (en) 1996-03-28 2009-11-24 Fisher-Rosemount Systems, Inc. Rule set for root cause diagnostics
US6539267B1 (en) 1996-03-28 2003-03-25 Rosemount Inc. Device in a process system for determining statistical parameter
US7630861B2 (en) 1996-03-28 2009-12-08 Rosemount Inc. Dedicated process diagnostic device
US20060277000A1 (en) * 1996-03-28 2006-12-07 Wehrs David L Flow measurement diagnostics
US8290721B2 (en) 1996-03-28 2012-10-16 Rosemount Inc. Flow measurement diagnostics
US7085610B2 (en) 1996-03-28 2006-08-01 Fisher-Rosemount Systems, Inc. Root cause diagnostics
US5875413A (en) * 1996-05-17 1999-02-23 Waekon Corporation Digital remote gauge assembly
US5808902A (en) * 1996-05-23 1998-09-15 Basic Measuring Instruments Power quality transducer for use with supervisory control systems
US6032109A (en) * 1996-10-21 2000-02-29 Telemonitor, Inc. Smart sensor module
US6601005B1 (en) 1996-11-07 2003-07-29 Rosemount Inc. Process device diagnostics using process variable sensor signal
US6754601B1 (en) 1996-11-07 2004-06-22 Rosemount Inc. Diagnostics for resistive elements of process devices
US6519546B1 (en) 1996-11-07 2003-02-11 Rosemount Inc. Auto correcting temperature transmitter with resistance based sensor
US6427129B1 (en) * 1997-07-14 2002-07-30 Endress + Hauser Gmbh + Co. Measuring assembly
US6243654B1 (en) 1997-10-07 2001-06-05 Telemonitor, Inc. Transducer assembly with smart connector
EP0949592A3 (en) * 1997-11-21 2000-04-12 Prüftechnik Dieter Busch Ag System for measuring or to identify oscillation or noise
DE19805606A1 (en) * 1998-02-12 1999-09-02 Schmersal Eot Gmbh & Co Kg Procedure for configuring sensors
US6321172B1 (en) 1998-02-12 2001-11-20 Schmersal-Eot Gmbh & Co. Kg Method for configuring sensors
US6092410A (en) * 1998-02-20 2000-07-25 Marconi Commerce Systems Inc. Meter calibration and drift compensation device
US6223134B1 (en) * 1998-03-20 2001-04-24 National Instruments Corporation Instrumentation system and method including an improved driver software architecture
US5963726A (en) * 1998-03-20 1999-10-05 National Instruments Corporation Instrumentation system and method including an improved driver software architecture
US6085156A (en) * 1998-03-20 2000-07-04 National Instruments Corporation Instrumentation system and method having instrument interchangeability
US6321171B1 (en) 1998-04-03 2001-11-20 Tektronix, Inc. Electronic measurement instrument probe accessory offset, gain, and linearity correction method
US6232764B1 (en) 1998-06-12 2001-05-15 Tektronix, Inc. Accessory with internal adjustments controlled by host
US6594603B1 (en) 1998-10-19 2003-07-15 Rosemount Inc. Resistive element diagnostics for process devices
US6615149B1 (en) 1998-12-10 2003-09-02 Rosemount Inc. Spectral diagnostics in a magnetic flow meter
US6611775B1 (en) 1998-12-10 2003-08-26 Rosemount Inc. Electrode leakage diagnostics in a magnetic flow meter
WO2000065311A1 (en) * 1999-04-27 2000-11-02 D2T Electronique Device for automatic identification for a sensor for test stands
EP1048933A1 (en) * 1999-04-27 2000-11-02 Condiacq Identification device for sensor for use in a test bed
FR2793023A1 (en) * 1999-04-27 2000-11-03 Condiacq AUTOMATIC SENSOR IDENTIFICATION DEVICE USED ON TEST BENCH, AND TEST BENCH EQUIPPED WITH SUCH DEVICES
US20090027659A1 (en) * 1999-06-18 2009-01-29 Sambra Sensors Ab Measuring system for measuring a physical parameter influencing a sensor element
US6934015B1 (en) 1999-06-18 2005-08-23 Samba Sensors Ab Method and a device for bending compensation in intensity-based fibre-optical measuring systems
WO2000079233A1 (en) * 1999-06-18 2000-12-28 Samba Sensors Ab A method and a device for bending compensation in intensity-based fibre-optical measuring systems
US20050243308A1 (en) * 1999-06-18 2005-11-03 Samba Sensors Ab Method and a device for bending compensation in intensity-based fibre-optical measuring systems
US7010459B2 (en) 1999-06-25 2006-03-07 Rosemount Inc. Process device diagnostics using process variable sensor signal
US20040024568A1 (en) * 1999-06-25 2004-02-05 Evren Eryurek Process device diagnostics using process variable sensor signal
US6505517B1 (en) 1999-07-23 2003-01-14 Rosemount Inc. High accuracy signal processing for magnetic flowmeter
WO2001016571A1 (en) * 1999-08-27 2001-03-08 Rosemount Inc. Prediction of error magnitude in a pressure transmitter
US6701274B1 (en) 1999-08-27 2004-03-02 Rosemount Inc. Prediction of error magnitude in a pressure transmitter
FR2807514A1 (en) * 2000-04-05 2001-10-12 Vergne Innovation Pressure sensor, has Hall sensor with two point calibration avoids adjustment is simple and cheap
US6691068B1 (en) * 2000-08-22 2004-02-10 Onwafer Technologies, Inc. Methods and apparatus for obtaining data for process operation, optimization, monitoring, and control
US6970003B2 (en) 2001-03-05 2005-11-29 Rosemount Inc. Electronics board life prediction of microprocessor-based transmitters
US6629059B2 (en) 2001-05-14 2003-09-30 Fisher-Rosemount Systems, Inc. Hand held diagnostic and communication device with automatic bus detection
US6859755B2 (en) 2001-05-14 2005-02-22 Rosemount Inc. Diagnostics for industrial process control and measurement systems
US6772036B2 (en) 2001-08-30 2004-08-03 Fisher-Rosemount Systems, Inc. Control system using process model
US6892144B2 (en) 2001-09-25 2005-05-10 Landis+Gyr, Inc. Arrangement for providing sensor calibration information in a modular utility meter
US20030088374A1 (en) * 2001-09-25 2003-05-08 Slater Byron J. Arrangement for providing sensor calibration information in a modular utility meter
US20040070495A1 (en) * 2002-10-15 2004-04-15 Advanced Custom Sensors, Inc. Sensor signal conditioner
US6801868B1 (en) 2002-10-15 2004-10-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Real time calibration method for signal conditioning amplifiers
US6996488B2 (en) 2002-10-15 2006-02-07 Advanced Custom Sensors, Inc. Sensor signal conditioner
US7114388B1 (en) 2003-04-21 2006-10-03 Ada Technologies, Inc. Geographically distributed environmental sensor system
US7290450B2 (en) 2003-07-18 2007-11-06 Rosemount Inc. Process diagnostics
US20050011278A1 (en) * 2003-07-18 2005-01-20 Brown Gregory C. Process diagnostics
US7018800B2 (en) 2003-08-07 2006-03-28 Rosemount Inc. Process device with quiescent current diagnostics
US20050030185A1 (en) * 2003-08-07 2005-02-10 Huisenga Garrie D. Process device with quiescent current diagnostics
US20050072239A1 (en) * 2003-09-30 2005-04-07 Longsdorf Randy J. Process device with vibration based diagnostics
US7627441B2 (en) 2003-09-30 2009-12-01 Rosemount Inc. Process device with vibration based diagnostics
US20050132808A1 (en) * 2003-12-23 2005-06-23 Brown Gregory C. Diagnostics of impulse piping in an industrial process
US7523667B2 (en) 2003-12-23 2009-04-28 Rosemount Inc. Diagnostics of impulse piping in an industrial process
US20110196618A1 (en) * 2004-01-15 2011-08-11 Icon Interventional Systems, Inc. Method for verifying position on an angioplasty balloon
US7945409B2 (en) * 2004-01-15 2011-05-17 Icon Interventional Systems, Inc. Method for verifying position on an angioplasty balloon
US20050159802A1 (en) * 2004-01-15 2005-07-21 Icon Interventional Systems, Inc., An Ohio Corporation Method for verifying position on an angioplasty balloon
US6920799B1 (en) 2004-04-15 2005-07-26 Rosemount Inc. Magnetic flow meter with reference electrode
US7046180B2 (en) 2004-04-21 2006-05-16 Rosemount Inc. Analog-to-digital converter with range error detection
US20070265715A1 (en) * 2004-04-26 2007-11-15 Benoit Chouinard Method for Permanent Calibration Based on Actual Measurement
US7634374B2 (en) * 2004-04-26 2009-12-15 Orthosoft Inc. Method for permanent calibration based on actual measurement
US8016745B2 (en) 2005-02-24 2011-09-13 Ethicon Endo-Surgery, Inc. Monitoring of a food intake restriction device
US7775215B2 (en) 2005-02-24 2010-08-17 Ethicon Endo-Surgery, Inc. System and method for determining implanted device positioning and obtaining pressure data
US8066629B2 (en) 2005-02-24 2011-11-29 Ethicon Endo-Surgery, Inc. Apparatus for adjustment and sensing of gastric band pressure
US8016744B2 (en) 2005-02-24 2011-09-13 Ethicon Endo-Surgery, Inc. External pressure-based gastric band adjustment system and method
US7927270B2 (en) 2005-02-24 2011-04-19 Ethicon Endo-Surgery, Inc. External mechanical pressure sensor for gastric band pressure measurements
US7658196B2 (en) 2005-02-24 2010-02-09 Ethicon Endo-Surgery, Inc. System and method for determining implanted device orientation
US7775966B2 (en) 2005-02-24 2010-08-17 Ethicon Endo-Surgery, Inc. Non-invasive pressure measurement in a fluid adjustable restrictive device
US20060290488A1 (en) * 2005-05-27 2006-12-28 Bionime Corporation Coding module and sensing meter and system therefor
US8112565B2 (en) 2005-06-08 2012-02-07 Fisher-Rosemount Systems, Inc. Multi-protocol field device interface with automatic bus detection
US20060282580A1 (en) * 2005-06-08 2006-12-14 Russell Alden C Iii Multi-protocol field device interface with automatic bus detection
US20070068225A1 (en) * 2005-09-29 2007-03-29 Brown Gregory C Leak detector for process valve
US7940189B2 (en) 2005-09-29 2011-05-10 Rosemount Inc. Leak detector for process valve
US20090303057A1 (en) * 2005-09-29 2009-12-10 Brown Gregory C Leak detector for process valve
US8152710B2 (en) 2006-04-06 2012-04-10 Ethicon Endo-Surgery, Inc. Physiological parameter analysis for an implantable restriction device and a data logger
US8870742B2 (en) 2006-04-06 2014-10-28 Ethicon Endo-Surgery, Inc. GUI for an implantable restriction device and a data logger
US8010322B2 (en) 2006-05-17 2011-08-30 Honeywell International Inc. Signal conditioning IC with conditioning-coefficient memory
US20070271069A1 (en) * 2006-05-17 2007-11-22 Honeywell International Inc. Signal conditioning ic with conditioning-coefficient memory
US8175835B2 (en) 2006-05-17 2012-05-08 Honeywell International Inc. Flow sensor with conditioning-coefficient memory
US7953501B2 (en) 2006-09-25 2011-05-31 Fisher-Rosemount Systems, Inc. Industrial process control loop monitor
US20080125884A1 (en) * 2006-09-26 2008-05-29 Schumacher Mark S Automatic field device service adviser
US8788070B2 (en) 2006-09-26 2014-07-22 Rosemount Inc. Automatic field device service adviser
US7750642B2 (en) 2006-09-29 2010-07-06 Rosemount Inc. Magnetic flowmeter with verification
US7321846B1 (en) 2006-10-05 2008-01-22 Rosemount Inc. Two-wire process control loop diagnostics
US8275313B1 (en) 2007-01-15 2012-09-25 Advanced Distributed Sensor Systems Long range, low power, mesh networking without concurrent timing
US20090043530A1 (en) * 2007-08-06 2009-02-12 Sittler Fred C Process variable transmitter with acceleration sensor
US8898036B2 (en) 2007-08-06 2014-11-25 Rosemount Inc. Process variable transmitter with acceleration sensor
US20090083001A1 (en) * 2007-09-25 2009-03-26 Huisenga Garrie D Field device for digital process control loop diagnostics
US7590511B2 (en) 2007-09-25 2009-09-15 Rosemount Inc. Field device for digital process control loop diagnostics
US8187163B2 (en) 2007-12-10 2012-05-29 Ethicon Endo-Surgery, Inc. Methods for implanting a gastric restriction device
US8100870B2 (en) 2007-12-14 2012-01-24 Ethicon Endo-Surgery, Inc. Adjustable height gastric restriction devices and methods
US8142452B2 (en) 2007-12-27 2012-03-27 Ethicon Endo-Surgery, Inc. Controlling pressure in adjustable restriction devices
US8377079B2 (en) 2007-12-27 2013-02-19 Ethicon Endo-Surgery, Inc. Constant force mechanisms for regulating restriction devices
US8192350B2 (en) 2008-01-28 2012-06-05 Ethicon Endo-Surgery, Inc. Methods and devices for measuring impedance in a gastric restriction system
US8591395B2 (en) 2008-01-28 2013-11-26 Ethicon Endo-Surgery, Inc. Gastric restriction device data handling devices and methods
US8337389B2 (en) 2008-01-28 2012-12-25 Ethicon Endo-Surgery, Inc. Methods and devices for diagnosing performance of a gastric restriction system
US7844342B2 (en) 2008-02-07 2010-11-30 Ethicon Endo-Surgery, Inc. Powering implantable restriction systems using light
US8221439B2 (en) 2008-02-07 2012-07-17 Ethicon Endo-Surgery, Inc. Powering implantable restriction systems using kinetic motion
US8114345B2 (en) 2008-02-08 2012-02-14 Ethicon Endo-Surgery, Inc. System and method of sterilizing an implantable medical device
US8591532B2 (en) 2008-02-12 2013-11-26 Ethicon Endo-Sugery, Inc. Automatically adjusting band system
US8057492B2 (en) 2008-02-12 2011-11-15 Ethicon Endo-Surgery, Inc. Automatically adjusting band system with MEMS pump
US8034065B2 (en) 2008-02-26 2011-10-11 Ethicon Endo-Surgery, Inc. Controlling pressure in adjustable restriction devices
US7933731B2 (en) * 2008-02-29 2011-04-26 Omega Engineering, Inc. Smart sensor
US20090217755A1 (en) * 2008-02-29 2009-09-03 Omega Engineering, Inc. Smart sensor
US8187162B2 (en) 2008-03-06 2012-05-29 Ethicon Endo-Surgery, Inc. Reorientation port
US8233995B2 (en) 2008-03-06 2012-07-31 Ethicon Endo-Surgery, Inc. System and method of aligning an implantable antenna
US20110179879A1 (en) * 2008-12-19 2011-07-28 Honeywell International Inc. Multi range pressure sensor apparatus and method utilizing a single sense die and multiple signal paths
US8490496B2 (en) 2008-12-19 2013-07-23 Honeywell International Inc. Multi range pressure sensor apparatus and method utilizing a single sense die and multiple signal paths
US7921734B2 (en) 2009-05-12 2011-04-12 Rosemount Inc. System to detect poor process ground connections
US20100288054A1 (en) * 2009-05-12 2010-11-18 Foss Scot R System to detect poor process ground connections
US20100305465A1 (en) * 2009-05-27 2010-12-02 Honyewell International Inc. Multi-dynamic-range sensor
US10330513B2 (en) 2009-05-27 2019-06-25 Honeywell International Inc. Multi-dynamic-range sensor
EP2284559A3 (en) * 2009-08-14 2016-03-23 General Electric Company Electrical equipment assembly and method of calibrating an electrical equipment assembly
US8656772B2 (en) 2010-03-22 2014-02-25 Honeywell International Inc. Flow sensor with pressure output signal
WO2012056296A1 (en) * 2010-10-26 2012-05-03 Eaton Corporation Method of enabling calibration of a current transformer, and associated apparatus
US8695417B2 (en) 2011-01-31 2014-04-15 Honeywell International Inc. Flow sensor with enhanced flow range capability
US9207670B2 (en) 2011-03-21 2015-12-08 Rosemount Inc. Degrading sensor detection implemented within a transmitter
US8718981B2 (en) 2011-05-09 2014-05-06 Honeywell International Inc. Modular sensor assembly including removable sensing module
US8770034B2 (en) 2011-09-06 2014-07-08 Honeywell International Inc. Packaged sensor with multiple sensors elements
US9052240B2 (en) 2012-06-29 2015-06-09 Rosemount Inc. Industrial process temperature transmitter with sensor stress diagnostics
US9602122B2 (en) 2012-09-28 2017-03-21 Rosemount Inc. Process variable measurement noise diagnostic
US9052217B2 (en) 2012-11-09 2015-06-09 Honeywell International Inc. Variable scale sensor
US10502760B2 (en) 2017-04-11 2019-12-10 General Electric Company Pitot-static air data test system with pilot and co-pilot verification
GB2602533A (en) * 2020-08-06 2022-07-06 Cirrus Logic Int Semiconductor Ltd Resistive sensor based data acquisition using low distortion analog front-end and digital gain error correction
US11782101B2 (en) 2020-08-06 2023-10-10 Cirrus Logic, Inc. Hall sensor-based data acquisition system

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